Viruses

Measles cases have ticked up in the U.K. following lower rates of MMR vaccination, and the U.S. could see similar outbreaks

Measles is extremely infectious. Vaccines provide good protection, but some adults may need a top-up shot

A surge in respiratory disease in China appears to be caused by known pathogens, but the pattern of infections is still unusual

Novavax’s protein-based vaccine is the latest FDA-authorized COVID booster available this fall. Here’s what you should know

After avian influenza killed 21 endangered California Condors, government officials are testing a vaccine that could protect the massive scavengers from infection

Global efforts to eradicate the poliovirus were recently described as unsuccessful—yet Afghanistan and Pakistan are now on the verge of eliminating it

Malaria grabs headlines, but U.S. residents are more likely to encounter West Nile virus and other mosquito-borne illnesses

Genetic susceptibilities, the environment and the body’s response to inflammation all influence our odds of falling ill

Unregulated wild animal markets increase the risk of more epidemics

Recently released data from samples of the COVID-causing virus SARS-CoV-2 at the market where many early cases of the disease occurred suggest animals were present but stop short of proving that they were infected and transmitted the virus to humans

Uncertain funding means wastewater surveillance programs could close in the future